package com.heima.admin.gateway.filter;

import com.heima.admin.gateway.util.AppJwtUtil;
import io.jsonwebtoken.Claims;
import lombok.SneakyThrows;
import org.apache.commons.lang.StringUtils;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.core.annotation.Order;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

@Component
public class AuthorizeFilter implements GlobalFilter, Ordered {

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        //获取requset和response对象
        ServerHttpResponse response = exchange.getResponse();
        ServerHttpRequest request = exchange.getRequest();
        //判断是否登录
        if (request.getURI().getPath().contains("/login/in")) {
            return chain.filter(exchange);
        }
        //获取token
        String token = request.getHeaders().getFirst("token");
        //判断token是否存在
        if (StringUtils.isEmpty(token)) {
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }
        //判断token是否有效
        Claims claimsBody = AppJwtUtil.getClaimsBody(token);
        try {
            int status = AppJwtUtil.verifyToken(claimsBody);
            if(1 == status || 2 == status){
                response.setStatusCode(HttpStatus.UNAUTHORIZED);
                return response.setComplete();
            }else {
                return chain.filter(exchange);
            }
        } catch (Exception e) {
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }
    }


    @Override
    public int getOrder() {
        return -1;
    }
}
